what is construction joint? why do we give expancion joint
in building?

Answer Posted / divusp

to make a monolithic structure between old and new concrete portion in member it is proposed special condition by providing L groove or joining chemical/materials is called construction joint.
Due to thermal condition concrete may shrink/expand, to avoid failure of structure due to thermal condition it is proposed to provide gap between structure , this gap called expansion or thermal expansion joint.

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